package com.dkd.day20250616;

public class SolutionmergeTrees {
    public static void main(String[] args) {

    }

    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     *
     * @param t1 TreeNode类
     * @param t2 TreeNode类
     * @return TreeNode类
     */
    public TreeNode mergeTrees (TreeNode t1, TreeNode t2) {
        // write code here
        if (t1 == null) return t2;
        if (t2 == null) return t1;
        TreeNode head = new TreeNode(t1.val + t2.val);
        head.left=mergeTrees(t1.left, t2.left);
        head.right=mergeTrees(t1.right, t2.right);
        return head;
    }
}
